CN1272900A - Anti-theft device with thermally controllable locking mechanism - Google Patents
Anti-theft device with thermally controllable locking mechanism Download PDFInfo
- Publication number
- CN1272900A CN1272900A CN98809767.2A CN98809767A CN1272900A CN 1272900 A CN1272900 A CN 1272900A CN 98809767 A CN98809767 A CN 98809767A CN 1272900 A CN1272900 A CN 1272900A
- Authority
- CN
- China
- Prior art keywords
- theft device
- control element
- retaining mechanism
- thermal control
- concave portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B73/00—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices
- E05B73/0017—Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0009—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with thermo-electric actuators, e.g. heated bimetals
Landscapes
- Burglar Alarm Systems (AREA)
Abstract
An anti-theft device (10) for deterring theft of a protected article has first and second housing elements (12, 16) and a locking mechanism (20) for securing a male portion (17) of the second housing element (16) to a female portion of the first housing element (12). The locking mechanism releases the male portion from the female portion, when actuated by an unlocking device operated by an authorized person. A thermally controllable element (36; 42) assumes a first position during normal temperatures, wherein the locking mechanism (20) is kept in a locked state, and a second position when heated to temperatures above a predetermined limit, wherein the locking mechanism is caused to release the male portion (17) from the female portion of the first and second housing elements (12, 16).
Description
Technical field
The present invention relates to be used for to prevent the anti-theft device of protecting article stolen; this device comprises first and second housing components and retaining mechanism; this retaining mechanism is used for the convex of second housing component is fixed on the concave portions of first housing component; this retaining mechanism is arranged to like this: when the unlocking apparatus of the people that has the right (authorizedperson) operation drove it, it discharged the convex part from concave portions.
The description of prior art
Above-mentioned anti-theft device is used for preventing to protect article or goods stolen, is particularly useful in department store or the shop.It protects attractive and the article that take off easily such as clothes, handbag, footwear or the like have special benefits for shop owner by anti-theft device is connected on each article.This connection forms by this way: by means of the unlocking apparatus of special use, anti-theft device can only remove the article from protection, and unlocking apparatus that should the special use people that only has the right can enter.Anti-theft device usually is furnished with a glass tube at least, and this glass tube accommodates the fluid of decolouring or bad smell.In addition, anti-theft device designs in one way, consequently, if thereby unauthorized people such as thief damage anti-theft device to attempt to take off this device from protection the article, and glass tube is with fragmentation and begin leakage so.Therefore,, make it useless, therefore prevent potential thief's this infringement intention all actual purpose because broken glass tube is made dirty immediately or is infected with article.
As another alternative embodiment of fluid containment pipe, anti-theft device can be provided with sensor or transponder set, and this device is surveyed by the article monitoring system (EAS) of electricity.For example, anti-theft device is provided with the metal strip of amorphous magnetism alloy.The magnetic of metal tape is controlled as the induction oscillating magnetic field that detected arc produced by external device (ED).For example, this inquisitor or sensor are disclosed in US-A-5469140, US-A-5414412, US-A-5406262 and WO97/29463.
US-A-5275122 discloses aforesaid anti-theft device, realizes protection on the attractive article thereby this device is used for being connected to.This device comprises first element and second element, and first element has the connection pin that is inserted through article, and second element is used for being connected to and connects on the pin.First element comprises frangible glass-tube (ampoule), and this glass-tube accommodates dyeing liquid, described glass-tube fragmentation when handling anti-theft device.First element plays a part the base member of device, and second element plays a part locking element or head simultaneously, and this locking element or head are installed on the pin of base member, thereby firmly the protection article is fixed between first and second elements.For this reason, this head comprises locking device, this locking device is designed to like this, so that this head is i.e. axially moving towards base member along pin in one direction easily only, and anyly promptly will cause that away from the attempt of base member moving-head this head is locked on the pin immediately along relative direction.
Retaining mechanism on the head comprises that many less metals keep ball, these keep ball to be arranged in such a way in the inside groove of head, so that when this head is outwards extracted, make head when pin inwardly moves simultaneously, the maintenance ball presss from both sides on the bottom that leans against pin and groove firmly.Therefore, the retaining mechanism of anti-theft device plays a part unidirectional connection, just could not provide work (promptly from pin release head) by this unidirectional connection of suitable unlocking apparatus, and the people that just has the right can obtain described unlocking apparatus.
US-A-4012813 relates to a kind of fastening devices that article are fixed together, and this device comprises male element and the concave member that connects releasedly.Male element comprises pin, and concave member comprises that magnetic keeps plug, and this plug is arranged on and is used for clamping releasedly on the housing of pin.When engaging, pin can not separate with retainer, unless use special instrument.Because plug is a magnetic material, the driven tool that therefore has electromagnet can be used to drive plug, thereby pulls down pin.Fastening devices is used on the antitheft sign, comprises circuit, if by the inspection position time, this sign does not remove suitably, so this circuit drives alarm buzzer.Same antitheft locking device is disclosed among US-A-4221025, US-A-4903383, US-A-5054172, US-A-5031287 and the US-A-4483049.
US-A-5140836 discloses the anchor clamps as anti-theft device, and it comprises U-shaped spare, and this U-shaped spare has first and second poles, and these thick sticks comprise the shelf that is arranged on each pole inboard.In addition, the anchor clamps housing has a pair of vertical passage and is provided with the device of a toothrow, and this passage is used for laying U-shaped pole, and this toothrow is used for engaging these shelfs on the U-shaped spare, thereby prevents that U-shaped spare from pulling down in vertical passage.This housing comprises magnetic-attraction element, and when being attracted by the external magnetic field, this magnetic-attraction element moves on this position, and these teeth and these shelfs break away from this position, so U-shaped spare can remove from housing.Same magnetic release clip is disclosed among the US-A-5337459, and U-shaped spare is by keeping ball rather than engaging by tooth.
The common drawback of above-mentioned former known anti-theft device be retaining mechanism (promptly, unidirectional connection, it makes convex part-pin or U-shaped spare-be inserted in the concave portions of device, prevented that simultaneously convex part from separating with concave portions, unless drive by unlocking apparatus) understand by other device that is not the unlocking apparatus of expecting and be driven.For example, the knowledge that discharges retaining mechanism about the magnetic in traditional anti-theft device is most possibly understood for the people-is spread between the individual of crime such as shop thief.Therefore, the shop thief is easily the permanent magnet of he or herself or may be that electromagnet takes the shop to, and comes to discharge the convex part from concave portions with the magnet body, thereby pulls down anti-theft device from desired articles.Then, can not make the thief stop article steathily.
General introduction of the present invention
The objective of the invention is to prevent the unlocking apparatus of unauthorized people by using themselves " self-control ", as permanent magnet or may be that battery powered electromagnet is pulled down anti-theft device from protecting article.
Purpose of the present invention realizes by anti-theft device, this anti-theft device comprises first and second housing components and retaining mechanism, this retaining mechanism is used for the convex of second housing component part (as pin) is fixed on the concave portions (comprise as the spring bias voltage and keep ball) of first housing component, retaining mechanism is arranged to like this: by being provided with Thermal Control Element to locking device, when the unlocking apparatus of the people's operation of having the right is driven, it discharges the convex part from concave portions, and this Thermal Control Element is arranged to present primary importance during normal temperature, retaining mechanism maintains the lock status, and when the temperature that is heated to above preset range, presenting the second place, retaining mechanism produces from the concave portions of first and second housing components and discharges the convex part.
Other purpose of the present invention, aspect and feature limit by the dependent claims of back.
Brief description of drawings
With reference to accompanying drawing, the preferred embodiments of the present invention and alternative embodiment are described now in further detail, in the accompanying drawings:
Fig. 1 is the schematic cross sectional view of the retaining mechanism of the anti-theft device in the preferred embodiment,
Fig. 2 is the schematic cross sectional view of the convex part of the anti-theft device in the preferred embodiment,
Fig. 3 is the schematic and example view of the pith of the retaining mechanism when being in normal or locking state,
Fig. 4 is the schematic and example view of the pith of retaining mechanism when being in release conditions,
Fig. 5 is the schematic top view of the retaining mechanism in the alternative embodiment, and
Fig. 6 is the schematic side elevation of the embodiment of Fig. 5.
Detailed description of the present invention
Fig. 1 shows the retaining mechanism of the anti-theft device 10 of the preferred embodiment of the present invention in the mode of schematic diagram.Anti-theft device 10 comprises first housing component 12, first housing component 12 plays a part the primary element of anti-theft device, these elements shown in it and the accompanying drawing break away from, and has an anti-theft device traditional, that from prior art, can learn, as the glass tube of changeable colour or bad smell liquid is housed, perhaps be used for responding the inquiry unit of interrogating signal, these will do more detailed explanation in the back.
Being included in first housing component 12 is retaining mechanism 20, and this retaining mechanism is contained in the frame of broken lines of Fig. 1.Retaining mechanism 20 comprises spring skew piston 22, in some scope this piston 22 in the axial direction (being on the vertical direction of Fig. 1) can move, these will be described below.Piston 22 has upper taper part 24, bottom body portion 26 and the cylindrical midsection between top 24 and body portion 26 and divides 25.In addition, piston 22 is provided with the hole 27 and the transverse holes 28 of coaxial line, hole 27 extends through tapering part 24, mid portion 25 and body portion 26 along the axial direction of piston 22, and transverse holes 28 extends through upper taper part 24 along the axial direction perpendicular to piston 22.Transverse holes 28 arranges that laying two metals keeps ball 29a and 29b, compares with the diameter that keeps ball 29a and 29b, and more therefore the diameter in hole 28 keeps ball accurately to be installed in the transverse holes 28 just a little.
In addition, retaining mechanism 20 comprises cone-shaped metal cover 30, and this cone-shaped metal cover 30 comprises metallic sheath opening 31, and opening 31 is aimed at the hole 27 of the coaxial line that is positioned at piston 22.By means of braced structures 14, taper sheath 30 is fixedly mounted in first housing component 12.
Skew spring 34 is arranged in the cavity between the bottom interior surface 15 of the bottom that being formed at cold 22 the body portion 26 of living and first housing component 12.Skew spring 34 preferably is made of metal, and has traditional design, and has along towards the upper direction of taper sheath 30 and the effect of biases piston 22.When upper taper part 24 bias voltages of piston 22 during to the upper inside surface of taper sheath 30, the maintenance ball 29a that is contained in the transverse holes 28 contacts with the side inner surface formation of taper sheath 30 with 29b, therefore force to keep ball to move inward mutually,, will describe these in further detail with reference to Fig. 3 and 4.
Retracting spring 36 is arranged between the lower surface of the upper face of body portion 26 of piston 22 and taper sheath 30.Be lower than the preset limit scope as temperature during normal working temperature, retracting spring 36 is arranged to be presented on the primary importance, and according to the resulting limit range of following mensuration can be arranged to sufficiently high value, preferably above 100 ℃.When on the primary importance that is presented on it at normal work period retracting spring 36, it can not be used in any very big masterpiece on the body portion 26 of piston 22.Therefore, when normal temperature, the spring force of biasing spring 34 is bigger than the spring force of spring 36, and the spring force of spring 34 acts on the direction on the top of taper sheath 30 (promptly in Fig. 1 upwards), and the spring force of spring 36 acts on the rightabout of the bottom 15 of first housing component 12 (promptly in Fig. 1 downwards).
When anti-theft device 10 was applied on the product, its course of work was as follows.Pin 18 on second housing component 16 passes the article that will protect, for example, passes button hole or directly passes for example fiber of dress.Pin 18 becomes needle-like in fact, and this needle-like makes pin 18 most advanced and sophisticated bore a hole for easily the article of protection and can not cause any special damage to the latter.Then, the pin 18 that plays the effect of convex connector be inserted in the concave portions of first housing component 12 (be opening 13 and 31 and the hole 27 of coaxial line).When pin 18 contact kept ball 29a and 29b surperficial, the latter outwards advanced, up to them with till the inner lateral surfaces generation of taper sheath 30 contacts.Owing to compression biasing spring 34 makes on piston 22 is movably disposed within axially, therefore, when entering pin 18 and push piston 22, give to keep ball 29a and 29b to produce bigger space, thereby towards the sidepiece of taper sheath 30 and outwards motion.Therefore, pin 18 can be inserted in the concave portions of first housing component 12 fully.
In case second housing component 16 is connected on first housing component 12, promptly pin 18 is inserted in the recessed portion of first housing component 12 fully, just can prevent that first and second housing components are separated from each other.Thereby pull down pin 18 if attempt to retract head 17 from the inside of first housing component 12, the spring force effect that is applied owing to biasing spring 34 makes progress to piston 22 application of forces so.Because the two is taper for the top 24 of cover 30 and piston 22, therefore when piston 22 moved upward towards the upper inside surface of cover 30, free space that ball 29a and 29b move within it, available had reduced.Consequently, keep the distance between ball 29a and the 29b enough not discharge pin 18 greatly.On the contrary; keep ball 29a-29b will be firmly to engage with notch 19 on the pin 18; therefore pin 18 is fixed in first housing component 12, and prevents second housing component 16 and 12 disengagements of first housing component, prevent that also antitheft device 10 removes from the article of being protected.
Normal operation also is shown among Fig. 3, and Fig. 3 is illustrated in the concave portions that is inserted into first housing component 12 fully, the pin 18 of head 17 when being the hole 27 of opening 31 in the taper sheath 30 and the coaxial line by piston 22.When piston 22 is pushed the top of taper sheath 30 to, keep ball 29a and 29b to be pushed against mutually on the pin 18.Therefore, if potential thief attempts to keep the hole 27 of head 17 and pin 18 release coaxial lines the small distance between ball 29a and the 29b will prevent this pulling down so.Consequently, along with the increase of the intensity of the portion of cutting somebody's hair 17, the pressure that keeps ball 29a and 29b to engage pin 18 has increased.Therefore, keep ball 29a and 29b fixator pins 18 firmly, the holddown groove notch portion 19 especially firmly.
Anti-theft device provides a kind of like this method for the people that has the right: discharge convex part (being pin 18) from the concave portions (being hole 27, maintenance ball 29a-29b and the taper sheath 30 of coaxial line) of retaining mechanism, and without any need for traditional unlocking apparatus.And the shop assistant on have the right people such as the cashier's desk will drive external device (ED) (this paper is unexposed), thereby provide thermal-neutron cutoff energy to retracting spring 36.According to a preferred embodiment of the invention, retracting spring 36 is made by the metal with so-called shape memory effect (SME).In addition, according to preferred embodiment, the said external heater is arranged to produce the higher-order of oscillation magnetic field of exposing in anti-theft device 10, wherein induced current in retracting spring 36.Consequently, spring 36 is heated to the high temperature well beyond above-mentioned preset range, under this high temperature, causes that the shape memory metal spring is transformed into second shape of Fig. 4 from first or the normal shape of Fig. 1 and Fig. 3.Compare with normal compression shape, second shape is extended (because on the second place, the length of shape memory spring 36 has increased widely) more, and the spring force of its medi-spring 36 has increased.Therefore, therefore retracting spring 36 compresses biasing spring 34 along the bottom 26 away from the direction push piston 22 at the top of taper sheath 30.
Consequently, the upper taper part 24 of piston 22 has moved one apart from d away from the top of cover 30, and therefore for keeping ball 29a-29b that bigger space is provided, these maintenance ball 29a and 29b can free outwards motions then.Therefore, keep the joint between ball 29a-b and the pin 18 to end, second housing component 16 (being head 17 and pin 18) can remove from the concave portions of first housing component 12.Then, the potentate can pull down the article of being protected from pin 18, and for example, response receives money as the sufficient amount of the payment of these article from client.
In a preferred embodiment, retracting spring 36 has the length of about 2mm when its normal condition.When spring is heated to when surpassing 65 ℃ temperature inductively, the length of spring increases about 3-4mm.Spring is made by Ni-Ti alloy, as the commercial Nitinol (Nitinol) that can buy from Raychem joint stock company limited.It does not have magnetic, so it can not be controlled by permanent magnet or homemade electromagnet, and above-mentioned anti-theft device of the prior art can be controlled by this permanent magnet or homemade electromagnet.In order to form faradic closed circuit, the electric conductor that does not illustrate in the accompanying drawing be connected spring 36 separately between the end on.
Being used for the heater of inductance heating retracting spring 36 can be known, traditional electric induction furnace itself.Using the significant advantage of inductance heater is that the element that leaves inductance retracting spring 36 can not be heated.Especially, this means do not have infringement or the danger of the article that the anti-theft device 10 that burns is connected thereto.
Do not wish to become the person-to-person open knowledge of following crime about the knowledge of locking device internal work principle.In order to prevent that unauthorized people from providing heat (for example by thermos very hot water being sprinkled to the anti-theft device) anti-theft device of unblanking by the heating source from them, retracting spring 36 designs by this way: be used for the predetermined temperature range changed between first and second shapes considerably beyond promptly 100 ℃ of the boiling points of water.As another embodiment, the heating of retracting spring 36 can realize by calutron rather than by inductance device.For example, be arranged to the external transmitter of electromagnetic radiation make anti-theft device 10 to expose to the open air in radio wave or microwave.
Another retaining mechanism 40 is disclosed among Fig. 5.Locking device 40 comprises Thermal Control Element and three truck dead levers 43, and Thermal Control Element is the shape of shape memory metal ring 42, and truck dead lever 43 is installed on the inner surface of shape memory metal ring 40, and vertically extends towards central point from encircling 40 circumference.The second end 43b separately of truck dead lever 43 is arcs of concave.
When Thermal Control Element 40 was presented on its first or normal position, the second end 43b of truck dead lever 43 formed circle together and opens 44.As shown in fig. 6, truck dead lever 43 along a direction promptly be towards the inside of first housing component 12 Fig. 6 upward to flexibly moving.Therefore, between three truck dead levers 43, the pin 18 of second housing component is inserted in first housing component 12.But as shown in fig. 6, truck dead lever 43 can not move along relative direction by their normal horizontal position.Therefore, in case be inserted into opening 44, just can prevent that pin 18 from removing along relative direction.
In order to unblank to anti-theft device, the people that has the right operates above-mentioned inductance heater.When oscillating magnetic field is induced into the shape memory metal ring 40 of conduction, just produced heat.When the temperature of shape memory metal surpassed preset range, the diameter of ring increased 3-5% at least.Consequently, the opening between the curved end 43b of truck dead lever 43 has enlarged, and is the same shown in imaginary circle 44 '.In case shape memory metal ring 42 enters its second place (it comes surperficial with the imaginary circle 42 ' of Fig. 5), pin 18 just can freely remove from first housing component 12 so.
According to another alternative embodiment of the present invention, the induction recipient coil of separation connects into and is parallel to retracting spring.Induction recipient coil is arranged to accept the oscillating magnetic field that produced by for example said external device, when the nominator operates, has therefore produced induced-current, and this electric current provides by retracting spring.Consequently, heated retracting spring, when its temperature surpassed preset range, retracting spring was transformed into its second state, therefore presented the position of extension and discharged male element.
Embodiment as an alternative, Thermal Control Element can be implemented as and reverses spiral, and this reverses screw arrangement and becomes to present primary importance during normal temperature, and presents the second place when temperature surpasses preset range.Same as described above, when reversing spiral and present primary importance, reverse the pin that screw arrangement engaged and fixed second housing component, and when reversing spiral and present its second place, just stop the joint of pin.
As previously described, anti-theft device of the present invention preferably is furnished with and hinders the device of stealing, and for example this device can be the described any pattern of top " prior art " part.Therefore, anti-theft device comprises the glass tube that one or more is frangible, and these glass tubes accommodate the material of decolouring and/or bad smell.In addition, anti-theft device can be provided with the sensor or the inquisitor of magnetic or electricity, and these can be by itself being that known, electric article monitoring system (EAS) is surveyed.Best, this inquisitor comprises the amorphous magnetic cell, and the magnetic conductivity of this magnetic cell can be controlled by the magnetic field that the outside produces.At random, amorphous magnetic cell adjustable inductance ground connection is connected to electric resonance circuit, and its resonance frequency depends on the magnetic conductivity of amorphous element.
With reference to as example but not some embodiment of limitation reason have described the present invention above.As those of ordinary skills institute was understood easily, the present invention can realize that scope of the present invention only limits by the qualification of additional independent patent claim with other method rather than described these.In particular, should be noted that Thermal Control Element can be by not being that other device of induction heating apparatus heats.In addition, the concave portions of retaining mechanism can adopt other device that is not to keep ball, for example profile of tooth thing or hook, and the convex part needed not to be pin shape originally.In addition, Thermal Control Element can be by not being that other material with metal of SME effect forms.A kind of this alternate material is a bimetallic.
Claims
Modification according to the 19th of treaty
1. one kind is used for the anti-theft device (10) that prevents to protect article stolen, this anti-theft device comprises first and second housing components (12,16) and retaining mechanism (20), this retaining mechanism is used for the convex of second housing component part (17) is fixed on the concave portions of first housing component, and retaining mechanism comprises Thermal Control Element (36; 42), this Thermal Control Element is arranged to present primary importance during normal temperature, retaining mechanism (20) maintains the lock status, and when the temperature that is heated to above preset range, present the second place, retaining mechanism produces from first and second housing components (12,16) concave portions discharges convex part (17), it is characterized in that:
The electricity generation device, it is used for accepting magnetic energy and heat hot control element (36; 42).
2. anti-theft device according to claim 1 is characterized in that: Thermal Control Element (36; 42) form by material with shape memory effect (SME).
3. anti-theft device according to claim 1 is characterized in that: Thermal Control Element (36; 42) form by bimetallic material.
4. as the arbitrary described anti-theft device of above-mentioned claim, it is characterized in that: electric generation device is by Thermal Control Element (36; 42) constitute.
5. as anti-theft device as described in the claim 4, it is characterized in that: the described device that is used for producing electricity is an induction coil, and this coil is parallel to Thermal Control Element and connects.
As claim 1-3 arbitrary as described in anti-theft device, it is characterized in that: Thermal Control Element (36; 42) being arranged through the induced magnetism energy heats.
7. as anti-theft device as described in the claim 6, it is characterized in that: first housing component (12) comprises spring bias voltage plug (22) and is contained in wherein at least two and keeps balls (29a-29b), this plug has the concave portions of hole (27) shape that is coaxial line, thereby lay the convex part (17) of second housing component (16), by the described plug of spring coil (34) bias voltage, impel to keep ball and male portion point formation to be frictionally engaged, therefore convex partly is fixed in the concave portions, and
Thermal Control Element (36) is arranged on the antagonism position with respect to biasing spring coil (34), thereby hinders bias voltage and when being heated to the temperature that surpasses described scope, discharges to keep being frictionally engaged between ball and the male portion point.
8. each described anti-theft device of claim as described above also comprises: at least one enclosure space, and it preferably is the glass-tube shape, and this enclosure space accommodates the fluid of decolouring or bad smell; And device, it is used for responding unauthorized attempt of pulling down the convex part from the concave portions of first and second housing components, and broken this enclosure space.
9. as the arbitrary described anti-theft device of above-mentioned claim, also comprise the acceptance that respond request signal and produce the device of the signal of representing alert consitions.
10. anti-theft device as claimed in claim 9 is characterized in that: the described device that is used to produce the signal of expression alert consitions comprises noncrystal magnetic cell.
11. as anti-theft device as described in the claim 9, it is characterized in that: the described device that is used to produce the signal of expression alert consitions comprises electric resonance circuit.
Claims (11)
1. one kind is used for the anti-theft device (10) that prevents to protect article stolen; this anti-theft device comprises first and second housing components (12; 16) and retaining mechanism (20); this retaining mechanism is used for the convex of second housing component part (17) is fixed on the concave portions of first housing component; retaining mechanism is arranged to like this: when the people that has the right operates unlocking apparatus and is driven; this retaining mechanism discharges the convex part from concave portions, it is characterized in that:
Thermal Control Element (36,42), this Thermal Control Element is arranged to present primary importance during normal temperature, retaining mechanism (20) maintains the lock status, and when the temperature that is heated to above preset range, present the second place, retaining mechanism produces from the concave portions of first and second housing components (12,16) and discharges convex part (17).
2. anti-theft device according to claim 1 is characterized in that: Thermal Control Element (36; 42) form by material with shape memory effect (SME).
3. anti-theft device according to claim 1 is characterized in that: Thermal Control Element (36; 42) form by bimetallic material.
4. as each described anti-theft device of above-mentioned claim, it is characterized in that: Thermal Control Element (36; 42) be connected to electric generation device, thus when being exposed to oscillating magnetic field the heat hot control element.
5. as anti-theft device as described in the claim 4, it is characterized in that: the described device that is used for producing electricity is an induction coil, and this coil is parallel to Thermal Control Element and connects.
6. as anti-theft device as described in each of claim 1-3, it is characterized in that: Thermal Control Element (36; 42) being arranged through the induced magnetism energy heats.
7. as anti-theft device as described in the claim 6, it is characterized in that: first housing component (12) comprises spring bias voltage plug (22) and is contained in wherein at least two and keeps balls (29a-29b), this plug has the concave portions of hole (27) shape that is coaxial line, thereby lay the convex part (17) of second housing component (16), by the described plug of spring coil (34) bias voltage, impel to keep ball and male portion point formation to be frictionally engaged, therefore convex partly is fixed in the concave portions, and
Thermal Control Element (36) is arranged on the antagonism position with respect to biasing spring coil (34), thereby hinders bias voltage and when being heated to the temperature that surpasses described scope, discharges to keep being frictionally engaged between ball and the male portion point.
8. the arbitrary described anti-theft device of claim as described above also comprises: at least one enclosure space, and it preferably is the glass-tube shape, and this enclosure space accommodates the fluid of decolouring or bad smell; And device, it is used for broken enclosure space, convex is part, unauthorized attempt thereby response is pulled down from the concave portions of first and second housing components.
9. as the arbitrary described anti-theft device of above-mentioned claim, also comprise the acceptance that respond request signal and produce the device of the signal of representing alert consitions.
10. anti-theft device as claimed in claim 9 is characterized in that: the described device that is used to produce the signal of expression alert consitions comprises noncrystal magnetic cell.
11. as anti-theft device as described in the claim 9, it is characterized in that: the described device that is used to produce the signal of expression alert consitions comprises electric resonance circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9703623A SE513962C2 (en) | 1997-10-02 | 1997-10-02 | Anti-theft device |
| SE97036230 | 1997-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1272900A true CN1272900A (en) | 2000-11-08 |
Family
ID=20408508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98809767.2A Pending CN1272900A (en) | 1997-10-02 | 1998-09-29 | Anti-theft device with thermally controllable locking mechanism |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6285286B1 (en) |
| EP (1) | EP1027514B1 (en) |
| JP (1) | JP2001519490A (en) |
| CN (1) | CN1272900A (en) |
| AU (1) | AU746992B2 (en) |
| BR (1) | BR9812591A (en) |
| DE (1) | DE69804992T2 (en) |
| SE (1) | SE513962C2 (en) |
| WO (1) | WO1999018312A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107802375A (en) * | 2017-11-17 | 2018-03-16 | 广东工业大学 | Urethra opening and closing device |
| CN114948059A (en) * | 2022-07-12 | 2022-08-30 | 吉林大学 | Rotary self-locking mechanism, self-locking reversible clamping device and clamping method |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE517454C2 (en) * | 1998-04-01 | 2002-06-11 | Faergklaemman Ab | Anti-theft device and locking elements and associated release device for an anti-theft device |
| JP3613066B2 (en) * | 1999-04-15 | 2005-01-26 | ソニー株式会社 | Drive device using shape memory alloy |
| DE102004037413A1 (en) * | 2004-07-30 | 2006-03-23 | Schlüter Beteiligungs-Kommanditgesellschaft | Interlocking system for closure system in e.g. furniture, has blocking device adjustable between blocking and unblocking positions by wire, where wire/device is partially made up of temperature controlled form memory material e.g. polymer |
| EP1889993A1 (en) * | 2005-06-01 | 2008-02-20 | Plettac Seguridad y Sistemas, S.A. | Security opening mechanism |
| US8269631B2 (en) * | 2008-02-22 | 2012-09-18 | Xiao Hui Yang | Anti-theft device |
| US8117874B2 (en) | 2008-08-07 | 2012-02-21 | Checkpoint Systems, Inc. | Theft deterrent device including a spring washer |
| US8704665B2 (en) * | 2009-06-15 | 2014-04-22 | Wg Security Products | Multiple technology EAS tag and system |
| CN102682557B (en) * | 2012-06-19 | 2014-07-16 | 上海大施工贸有限公司 | Product anti-theft tag |
| US9334675B2 (en) * | 2012-08-15 | 2016-05-10 | Raytheon Company | Passive safety mechanism utilizing self-fracturing shape memory material |
| EP3019681B1 (en) | 2013-07-12 | 2018-10-03 | InVue Security Products, Inc. | Merchandise security devices for use with an electronic key |
| WO2015073615A1 (en) | 2013-11-15 | 2015-05-21 | Invue Security Products Inc. | Tethered security device for use with an electronic key |
| WO2015073668A1 (en) | 2013-11-18 | 2015-05-21 | Invue Security Products Inc. | Wrap for an item of merchandise |
| US10510945B1 (en) | 2014-10-06 | 2019-12-17 | National Technology & Engineering Solutions Of Sandia, Llc | Magnetoelastically actuated MEMS device and methods for its manufacture |
| US10132699B1 (en) | 2014-10-06 | 2018-11-20 | National Technology & Engineering Solutions Of Sandia, Llc | Electrodeposition processes for magnetostrictive resonators |
| US9637951B2 (en) * | 2014-10-10 | 2017-05-02 | Tyco Fire & Security Gmbh | Security tag |
| US10254097B2 (en) | 2015-04-15 | 2019-04-09 | Raytheon Company | Shape memory alloy disc vent cover release |
| US10121342B2 (en) * | 2016-12-07 | 2018-11-06 | Tyco Fire & Security Gmbh | Security tag with stain prevention pads |
| US20180340357A1 (en) | 2017-05-25 | 2018-11-29 | Invue Security Products Inc. | Package wrap |
| USD890618S1 (en) | 2018-02-27 | 2020-07-21 | Invue Security Products Inc. | Cable wrap |
| HUP1800372A1 (en) * | 2018-11-05 | 2020-05-28 | Shopguard Kft | Article surveillance tag |
| CN116291041A (en) * | 2019-01-11 | 2023-06-23 | 传感电子有限责任公司 | System and method for operating a security tag |
| US10995523B2 (en) * | 2019-03-12 | 2021-05-04 | Sensormatic Electronics, LLC | Security tag including thermally actuated detachment mechanism |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806910A (en) * | 1972-10-19 | 1974-04-23 | Check Mate Syst Inc | Product monitoring device and system |
| US4072867A (en) * | 1976-04-23 | 1978-02-07 | The Maytag Company | Motor energized latch mechanism |
| US4380097A (en) * | 1980-10-17 | 1983-04-19 | Check Mate Systems, Inc. | Product monitoring device |
| US4575706A (en) * | 1984-02-17 | 1986-03-11 | Heidman Jr William A | Combined magnetic and thermal relay and circuits for timed alarms and lamps of vehicles |
| US4617448A (en) * | 1984-12-18 | 1986-10-14 | North American Philips Corporation | Electrically releasable locking device |
| EP0212061A3 (en) * | 1985-05-23 | 1988-03-02 | Identitech Corporation | Antipilferage marker for clothing or similar articles |
| US5211183A (en) * | 1987-05-13 | 1993-05-18 | Wilson Bruce C | Steerable memory alloy guide wires |
| DE3820877A1 (en) * | 1988-06-21 | 1989-12-28 | Kern & Liebers | Device for the remote actuation of locks and of similar locking means |
| DE9001907U1 (en) * | 1990-02-17 | 1990-04-19 | Sematic Sicherheitstechnik GmbH, 7230 Schramberg | safety box |
| US5077872A (en) * | 1990-08-10 | 1992-01-07 | Antonson Security Denmark A/S | Antitheft device |
| US5905446A (en) * | 1997-03-24 | 1999-05-18 | Diebold, Incorporated | Electronic key system |
-
1997
- 1997-10-02 SE SE9703623A patent/SE513962C2/en not_active IP Right Cessation
-
1998
- 1998-09-29 AU AU93703/98A patent/AU746992B2/en not_active Ceased
- 1998-09-29 DE DE69804992T patent/DE69804992T2/en not_active Expired - Fee Related
- 1998-09-29 EP EP98946754A patent/EP1027514B1/en not_active Expired - Lifetime
- 1998-09-29 CN CN98809767.2A patent/CN1272900A/en active Pending
- 1998-09-29 JP JP2000515086A patent/JP2001519490A/en active Pending
- 1998-09-29 BR BR9812591-5A patent/BR9812591A/en not_active Application Discontinuation
- 1998-09-29 US US09/509,267 patent/US6285286B1/en not_active Expired - Fee Related
- 1998-09-29 WO PCT/SE1998/001727 patent/WO1999018312A1/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107802375A (en) * | 2017-11-17 | 2018-03-16 | 广东工业大学 | Urethra opening and closing device |
| CN114948059A (en) * | 2022-07-12 | 2022-08-30 | 吉林大学 | Rotary self-locking mechanism, self-locking reversible clamping device and clamping method |
| CN114948059B (en) * | 2022-07-12 | 2022-09-30 | 吉林大学 | Rotary self-locking mechanism, self-locking reversible clamping device and clamping method |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9812591A (en) | 2001-12-18 |
| SE9703623D0 (en) | 1997-10-02 |
| AU746992B2 (en) | 2002-05-09 |
| SE9703623L (en) | 1999-04-03 |
| US6285286B1 (en) | 2001-09-04 |
| EP1027514A1 (en) | 2000-08-16 |
| DE69804992D1 (en) | 2002-05-23 |
| AU9370398A (en) | 1999-04-27 |
| SE513962C2 (en) | 2000-12-04 |
| DE69804992T2 (en) | 2002-11-28 |
| EP1027514B1 (en) | 2002-04-17 |
| JP2001519490A (en) | 2001-10-23 |
| WO1999018312A1 (en) | 1999-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1272900A (en) | Anti-theft device with thermally controllable locking mechanism | |
| US4651136A (en) | Pulsed magnetic release mechanism | |
| DE69911100T2 (en) | Anti-theft device, a locking element therefor, and an unlocking device therefor | |
| US4685234A (en) | Surveillance marker clip assembly | |
| US20060170550A1 (en) | Cable alarm security device | |
| US5079540A (en) | Theft detection tag with adjustable loop | |
| EP0594324A2 (en) | Theft-protection device providing force-sensitive tamper detection | |
| US20160321894A1 (en) | Merchandise security device having shape memory alloy actuator and method of use | |
| US20030160697A1 (en) | Theft deterrent device | |
| CN117588112A (en) | Security tag with vertically releasable 3-ball clutch | |
| US11804116B2 (en) | Tethered security device for use with an electronic key | |
| US20080168811A1 (en) | Magnetic key for use with a security device | |
| US20170342747A1 (en) | Article surveillance tag | |
| US4380097A (en) | Product monitoring device | |
| US20210027588A1 (en) | Recoiler sensor | |
| US20120055944A1 (en) | Security system hard tag clamp and clamping method | |
| CN205224848U (en) | Lock state detection device | |
| US20050253702A1 (en) | Alarm system, security container and kit | |
| CN109030892A (en) | A kind of electric meter box capable of realizing electricity theft prevention | |
| CN219840492U (en) | Intelligent anti-theft magnetic lock for unmanned convenience store | |
| GB2440420A (en) | Anti-theft item tag | |
| CN106760989A (en) | A kind of door lock state detection means | |
| EP1889993A1 (en) | Security opening mechanism | |
| CN2036509U (en) | Multifunction burglar alarm device for automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |